Discussion on the Development Trend of Welding Materials in

The 21st century will be the century of rapid development of science and technology. Welding materials on a global scale, on the one hand in the early 21st century, will continue in the current framework of traditional welding consumables products to continue to grow and improve; the other hand, there have been some major changes in the prelude, this change may be The 21st century, about 20 years, the welding consumables industry will have a significant impact.

 

    1, to adapt to the welding automation and efficient welding of the trend of product structure adjustment

 

    In the early 21st century, the quality of China's steel will be with the progress of metallurgical technology, especially the "pure, micro-alloying and controlled rolling control cold" and other technologies in the promotion of key iron and steel enterprises, will make a variety of welding steel Welding is better, not easy to produce welding cracks and can use large-line energy welding, which will be in the traditional framework of traditional welding technology, the full pursuit of welding automation and efficient welding.

 

    China's shipbuilding system has been the first proposed, by 2005 China's shipyard's welding efficiency to reach more than 80%, of which CO2 gas welding application rate of 55%, welding mechanization automation rate of about 70%.

 

    It is predicted that in 2005, China's welding consumables, the possible welding rods accounted for 60% -70%, gas protection of solid wire about 20%, flux cored wire accounted for 2% -5%, submerged arc welding wire and flux accounted for 10 % -12%. Therefore, China's welding consumables industry should adapt to the trend of changes in consumer demand, the adjustment of industrial structure. In the gas protection welding with solid wire, flux cored wire, submerged arc welding wire and sintered flux and other aspects of economies of scale and high quality products.

 

    2, gas protection solid wire to low spatter high performance direction

 

    CO2 gas protection solid wire, affecting product quality has two key issues, one is the chemical composition of wire, the second is copper and winding.

 

    In recent years, in order to reduce the splash of CO2 welding and improve the performance of weld metal, foreign chemical composition of the wire made a lot of research work, including a wide range of components in the standard, the provisions of narrow internal control standards and add various Micro-alloying elements, made to reduce the welding spatter more than 50%, reducing the amount of welding dust more than 25% of the good results.

 

    Therefore, continue to focus on the scale of wire production efficiency, hope that key enterprises to establish "an annual output of more than 1-3 million t copper wire production line" at the same time, we must pay attention to the improvement of wire composition, the steel plant and the relevant focus on the production of wire Aspects of the work.

 

    3, flux cored wire to the "wide current amplitude", "low dust splash", "fast welding" direction

 

    4, submerged arc welding welding wire and flux to the development of high efficiency and more varieties of submerged arc welding wire, the development of low manganese, manganese, high manganese products

And with manganese silicon with the addition of different nickel, molybdenum, chromium content of a variety of products, and on this basis, to the "pure purification, micro-alloying" direction.

 

    5, is studying the 21st century, a new generation of steel and laser technology will lead to major changes in welding materials for the development of new materials in the 21st century, Japan in 1993 proposed the development of functional design ideas, the goal is to "improve the strength of steel 1-2 times, Increase the service life by more than doubling the environmental burden and reduce the total cost of the use of steel components, including maintenance costs.

 

    Japan hopes to replace 50 years of traditional steel with a new generation of super steel to promote economic development in the 21st century.

 

    China is also basically towards this goal, in late 1997 began to start a "new generation of micro-alloy high strength and high toughness" research work. Europe and the United States have also started this research work.

 

    After several years of research work, the basic characteristics of the new generation of steel (super steel) in the 21st century have emerged, it will be based on modern metallurgical theory and the latest control technology, the application of pure, microalloyed, high density dislocation Ultra-strong rolling, variable magnetic field precision heat treatment technology made of ultra-fine grain steel.

 

    New generation of steel in the 21st century, is still in the experimental research stage, to mass production there is a process. Is expected in 10-20 years, the market will provide affordable strength of 800-1500Mpa level of a new generation of steel products.

 

    Therefore, it can be envisaged that if 10 to 20 years later, a large number of new generation of high-strength steel to promote the use of welding technology will cause a major change.

 

    In short, in the early 21st century, the existing welding rods, welding wire, flux and other traditional welding materials will have a greater development and improvement. But perhaps in the 1920s, due to the progress of the new generation of steel and laser technology in the 21st century, there will be significant changes in welding (connecting) materials. In this regard, China's welding technology workers and related enterprises, to pay close attention to and timely work.